基于fx2n-48mrplc的交通灯控制.pdf

摘 要 随着社会经济的发展，城市交通问题越来越引起人们的关注。人、车、路三者关 系的协调，已成为交通管理部门需要解决的重要问题之一。城市交通控制系统是用于 城市交通数据监测、交通信号灯控制与交通疏导的计算机综合管理系统，它是现代城 市交通监控指挥系统中最重要的组成部分。 PLC 可编程序控制器是以微处理器为基础,综合了计算机技术、自动控制技术和通 讯技术发展而来的一种新型工业控制装置。它具有结构简单、编程方便、可靠性高等 优点, 已广泛用于工业过程和位置的自动控制中。据统计,可编程控制器是工业自动化装 置中应用最多的一种设备。专家认为,可编程控制器将成为今后工业控制的主要手段和 重要的基础设备之一,PLC 、机器人、CAD/CAM 将成为工业生产的三大支柱。由于 PLC 具有对使用环境适应性强的特性, 同时其内部定时器资源十分丰富,可对目前普遍使用 的“渐进式”信号灯进行精确控制,特别对多岔路口的控制可方便地实现。因此现在越 来越多地将 PLC 应用于交通灯系统中。同时,PLC 本身还具有通讯联网功能,将同一条道 路上的信号灯组成一局域网进行统一调度管理,可缩短车辆通行等候时间,实现科学化 管理。 关键词 交通灯；PLC 控制；程序；设计 I ABSTRACT With the development of social economy, people pay more and more attention to urban traffic problems. The coordination of people, cars and roads has become one of the important problems that traffic management departments need to solve. Urban traffic control system is used in city traffic data monitoring, traffic light control and traffic persuation computer integrated management system, it is the modern urban traffic control command system is the most important part of. PLC programmable controller is a new kind of industrial control device based on microprocessor and integrated computer technology, automatic control technology and communication technology. It has the advantages of simple structure, convenient programming and high reliability. It is widely used in automatic control of industrial processes and positions. According to statistics, programmable controller is the most widely used equipment in industrial automation equipment. Experts believe that programmable controller will become one of the main means and important basic equipment for industrial control in the future. PLC, robot, CAD/CAM will become the three pillars of industrial production. Because the PLC has the use of the characteristics of strong adaptability to environment, while its internal tim